Definition
ESFR sprinklers use K-factors of K200 (K14.0) up to K360 (K25.2) and are listed for storage occupancies up to 13.7 m (45 ft) without in-rack heads. They require a higher operating pressure (typically 3.5 bar / 50 psi or more at the head) and a strictly limited obstruction profile. ESFR is the default modern choice for high-bay logistics and warehouse storage under both NFPA 13 (Chapter 17) and EN 12845.
Referenced in
- EN 12845
- NFPA 13